ofproto_v1_5_parser: oxm_ids with name str in OFPActionCopyField
ofproto_v1_5_parser: oxm_ids with name str in OFPActionCopyField

Currently, oxm_ids argument of OFPActionCopyField should be a list of
OFPOxmId instances, but this patch enables to specify with the OXM field
name as the str type value which is corresponding to the keywords of
OFPMatch.

Signed-off-by: IWASE Yusuke <bb80e84cc9f5a8f01385872ee89032beb5d4eba7@gmail.com>
Signed-off-by: FUJITA Tomonori <93dac1fe9c4b2a3957982200319981492ad4976e@lab.ntt.co.jp>

lagopus/ryu-lagopus-ext,lagopus/ryu-lagopus-ext,fujita/ryu,osrg/ryu,osrg/ryu,osrg/ryu,fujita/ryu,iwaseyusuke/ryu,osrg/ryu,iwaseyusuke/ryu,lagopus/ryu-lagopus-ext,lagopus/ryu-lagopus-ext,osrg/ryu,iwaseyusuke/ryu,iwaseyusuke/ryu,fujita/ryu,iwaseyusuke/ryu,fujita/ryu,lagopus/ryu-lagopus-ext,fujita/ryu